Molding machinery.



No. 654,292. Patented July 24, |900. H TABUR & E. H. MUMFDRD.

MOLDING MACHINERY.

(Application med June 6,'1899.)

4 Sheets-#Sheet (No Model.;

1N: Nonms paens co. PNQIQLIYMQ., WASHINGTON. u. c

No. 654,292. Patented 1u|y24, 1900. H. TABoB & E. H. MuMFonn.

MOVLDING MACHINERY.

(Application led June 6, 1899.)

4 Sheets-Sheet 2 (No Model.,V

' Baie/MME July 24, |900.- H. TABB & E. H. MUMFQRJL5 HOLDING MAHINERY.A

(Application led Ju-ne 6, 1899.}

4 Sheets-Sheet 3,

(No Model.)

Patented July 24, |900..A

Tn: Nona-.s Varens co Puoraumo msu MON u (No Model.)

wilma/aseo 4Z FCE@ HARRIS TABOR, OF ELIZABETH, AND EDGAR H. MUMFORD, OFPLAINFIELI), NEV JERSEY, ASSIGNORS TO THE TABOR MANUFACTURING COMPANY,

or ELIZABETH, NEw JERSEY.

lVlOLDING MACHINERY.

SPECIFICATION forming part of Letters Patent No. 654,292, dated July 24,1900.

Application nea June e, 1899. serai No. 719,631. (No meer.)

T all whom tjr/mj concern.: Y Be it known that we, HARRIS TABOR, aresi;` dent of Elizabeth, and EDGAEH. MUMEoRD,

a resident of' Plainfield, countyof Union, and

State of New Jersey, citizens of the United States, have inventedcertain new and useful Improvements in Molding Machinery, of

which the following is a specification.

The present invention relates to molding lo machinery in general, andmore especially to apparatus for producing molds for that large range oflight castings which are still produced entirely by hand or by machineramming andthe patterns drawn by hand. Some of the objections to theformation of molds for such castings by other than hand methods are,first, the difficulty and costof mounting the patterns onparting-plates, since the partinglines separating the parts of the flaskare usually irregular and the plate must conform thereto nevertheless,and, second, in those cases where the patterns are drawn through astripping or silhouette plate and where the patterns are placed on aplane (match) plate these plates form the parting or ,dividing linesbetween the different parts of the complete mold or flask, one side ofthe plate serving for one part of the flask during the ramming of thesand. These methods of molding always leave a trace of the joint,commonly called the parting or joint7 line vin the casting, such partingor joint line being caused by the distinct line in the mold where theparts thereof close together. From this it follows, especially inmatch-platework, that the amount of this line or the displacement of onepart of the casting relative to the other part-t. e., of a half or partpattern relative to the other half or part when forming the mold-dependsupon the accuracy with which the respective parts of the patterns areplaced upon the plates and in all cases upon the condition of themold-frames and the fit of their dowels.

In the operation of producing or forming molds for light castings whichrequire to be duplicates of the patterns as nearly as possible it is thecustom of the hand melder to insert a rapping-spike through the top orcope l portion of the flask into preparedholes in the 5o patterns forthe purpose of rapping the .patterns while the mold or flask is closed,thus enlarging both parts of the mold at once. Under this procedure bothparts of the mold are rapped while the patterns are in a position commonto both parts of the. mold, thus p tending to the production of thefinest work;

but it has the seriousobjection 'of providing no limits to theenlargement of the mold by the blows of the molders mallet or hammer 6oas he raps the pattern,whence castings of various sizes are obtainedwhere uniformity is desired. Another objection to the'present handmethod when counterparts of the patterns are demanded is that due to therapping of the patterns after the cope is remove'd'and while thepatterns are being drawn from the drag, since the most difcult parts ofthe patterns go to the drag or lower part of the mold, which enables themolder to remove the cope with- 7o out distorting the mold, (therapping-iron having been used asv above describedg) but the .greaterdepth of the patterns in the drag calls for additional rapping of thepatterns while they are drawn therefrom, so that even though the molderhave a steady hand the lower part of the mold-that is, the drag--is aptto be enlarged beyond the pattern outlines in the cope and to beotherwise distorted, thus leading to the production of castings not trueto pattern. 8o

The main object of the present invention is the formation of molds whichshall be the exact counterpart of the patterns used.

Another object is to simplify, improve, and increase the efficiency ofmolding-machines, and more especially thoseof the general type shown byLetters Patent of the United States granted January 29, 1895, and Mayl1, 1897, and bearing numbers 533,401 and 582,325.

Another object is to connect oneand the 9osame vibrator-engine oragitator with a number of patterns or their carriers or supports insuccession even when these are of various sizes and various heightsabove a given plane,

and other objects, as will hereinafter more fully appear.

To these ends the invention consists of features of construction andcombinations of denections.

sfs

vices hereinafter described, and more particularly pointed out in theclaims concluding this specification.

The preferred form of the invention is illustrated in the accompanyingdrawings, forming part of this specification, in which- Figure 1 is afront elevation, partly broken away and partly in section, of a machinein which the invention is embodied. Fig. 1a is a sectional detail view.Fig. 2 is aside elevation, partly broken away, of the same, the moldbeing omitted and the rammer-carrier being thrown back. Fig. 3 is a planview, and Fig. 4 is a sectional view on line 4 4 of Fig. 3, of a mold, apattern-carrier, a vibrator, and guides. Fig. 5 is a sectional view of amold, a vibrator, match-plate, and patterns. Fig. 6 is a plan, Fig. 7acentral vertical sectional view, and Fig. 8 a side view, of guides formold parts and pattern-carrier. Fig. 9 is a detail side View, partly insection, of arapping or vibrator engine, mold, and con- Fig. 10 is asectional view on line 10 10 of Fig. 9 looking in the direction of thearrows. Fig. 11 is a plan, with parts omitted, of the devices-shown inFigs. 9 and 10. Fig. 12 is a diagram illustrating aV twoway cock. Fig.13 is a diagram illustrating a check-valve.

The same reference character will be used to designate the same part inthe various fi gures of the drawings. i

Referring to the drawings, thereference 1 indicates a suitable castingor metal baseframe which is furnished centrally with an upright piston2, which forms a guide for the hollow cylinder 3.

4 is a table or mold-support, shown as attached to the cylinder 3 byheaded screwbolts 5 passing through countersunk holes in table 4 andengaging with threaded holes in cylinder 3. The cylinder 3 is providedat opposite sides with laterally-extending arms C, which are providedwith vertical perforations, through which rods 7 project from the base1, the rods being screwed into the base. The table 4 has attachedthereto underneath two caps 8, inclosing the upper ends of studs 7.Tubes 9 surround studs 7 between the caps 8 and the arms 6, settingintocircular rabbetsiu caps 8 and outside of rings 10, resting on the arms6. The studs 7 are reduced in diameter for some distance at their upperends and are provided with nuts 11 to form abutments for spiral springs12, which bear thereagainst and against the inside of caps 8. Thesprings 12 are under compressionand form buffers for the table4 when thelatter descends, as hereinafter set forth. The table 4 and cylinder 3are moved upwardly by meansof a pipe 13, which opens into the space 14between the upper closed end of piston 2 and the table 4. The flow ofthe compressed gas, as air or steam, is controlled by means of anadmission and waste cock at 15, the admission being at 16 and thewaste-orifice at 17 and the position of the cock being controlled by ahandle 18.

erable distance at their upper ends and being provided each with nuts 23and 24, respectively, above and below the eyes 2l. The nuts 23 24provide for the adjustment of head 2O along the rods 22. naled on ashaft 25, which is firmly attached to the base 1, and the swingingmotion of the rods 22 is limited by stop-plates 26, which are firmlybolted to the base lby screw-bolts 27 and are provided with front andback stops 28 29, coacting with rods 22. The head 20 is provided with asuitable handle or bail 30 for the hand to grasp in pulling the rammerand head forward or in pushing them rearward. `The weight of the rammer,the head, and the rods 22 may be nearly counterbalanced, as by spring3l,connected at vone end to a screw-eyebolt 32, which passes freelythrough an arm 33 of a plate 26 and is provided with an adjusting-nut34, and connected at the other end to an eye in the end of an arm 35,rigidly connected with shaft 25,

the spring 3l (or springs 31, since the described construction may beemployed at each side of the machine) tending to throw the arms 22forward against stops 28.

1n order to provide against' the admission The rods 22 are jourof steamor other pressure to the cylinder 3 'such that the bent end 40 of rod 37may have a travel due toa quarter-turn (more or less) of the handle 18,and the three-way cock 15 above named is arranged to admit air or steamto the cylinder 3 when in one position and to'open the waste 17 when inanother position, said positions being one-quarter turn (more or less)of the cock apart. 36, rod 37, arm 38, slot 39,'and end 40 are soarranged and proportioned as will secure that the end 40 shall be at theupper endof slot 39 when lever 18 and rods 22 are all upright orvertical and at the lower end of slot 39 when lever 18 is vertical andthe rods 22 are tilted back against stops 29, and the cock 15 isarranged so that when lever 18 is vertical the waste 17 is incommunication with the cylinder 3and so that when lever 18 is turnedforwardly (to the left in Fig. 2) to a horizontal position the steam orcompressed The slot 39 of the arm 38 is The lever IIO air is admittedthrough pipe 16 to pipe 13 and to the cylinder 3; butit is not possibleto turn handle 18 to admit pressure to the cylinder 3 when the rammer isturned back, (rods 22 against stop 29,) since the rod 37 cannot descend,owing to the fact that its end is at the bottom of slot 39; but when therammer is in position over table 4 the handle 18 can be turned to admitpressure to the cylinder 3. The right-hand plate 26 may be formed with ahollow pedestal 41, through which pipe 13 passes with a space betweenthe pipe and the pedestal, if desired, to prevent accidentally burninganything brought against the pedestal when steam is used.

The mold-frames (shown in Figs. 3, 4, 9, 10, and 11 of the drawings)will be described next. For convenience of description one frame will bereferred to as the cope and the other frame as the dragg but it is to beunderstood that either frame shown may be used for either cope or drag.

The drag 42 is shown as a rectangular wooden frame, the inner sides ofwhich may be dished, as at 43, (shown only in Fig. 4,) and one edge ofwhich is rabbeted all the way around at 44, (see Fig. 7,) or the rabbetmay be on the cope. (Sec Fig. 4.) At two opposite sides the drag 42 hasV-shaped guidebars 45, rigidly connected thereto by plates 46 and 47 andbolts 48. The openings of the V-shaped guides are toward and the guidesare some distance away from the adjacent sides of the drag, and theplates 46 are at one end of the guides and are cut away between theguides 45 and the sides of the drag. (See Fig. 7.)

The cope 49 is similar to the drag in form and may have dishedinnerfaces 50. (Shown only in Fig. 4.) Plates 51 are attached to the cope attwo opposite sides thereof by screwbolts 52, each plate being formedwith two outstanding vertical rectangular parallel ribs 53, which arerabbeted at their inner edges, (rabbets marked 54,) and the distancebetween ribs 53 is substantially equal to the eX- treme width of theguides Caps 55 are attached to the ribs 53 by threaded bolts 56, whichpass through vertical slots 57 in the caps and engage threaded holes inthe ribs. The caps 55 are formed with long V grooves or guides 58 (totit the exterior V-surt'ace of the guides 45) and with lateral platesOrhandles 59. Suitable liners between the meeting surfaces of ribs 53and cap 55 may be employed for adjustment, as indicated in the drawingsby the parallel lines, and the caps 55 have extensions 60 to fit betweenthe parallel faces of the rabbets, as shown more clearly in Fig. 6.

As illustrated in Figs. and 4, the patterns 61 maybe rigidly connectedwith a frame 62, which surrounds the snap-flask formed by the cope andthe drag. The frame 62 is shown as being T-shaped in cross-section, withthe horizontal flange resting in the rabbet 44, and provided withsymmetrically-disposed handles 63. The patterns 6l are shown as beingconnected rigidly with cross-bars 64, which bars are rigidly secured tothe horizontal flange of the frame 62, as by screws, the whole forming arigid construction or gate of patterns. Each of the patterns 61 iscomplete in itselfthat is, none is divided into a number of parts; buteach is an entirety in itself, forming the entire mold or counterpartinthe sand, and is rigidly attached to or connected with thepattern-carrying frame 62 by the arms or rods 64. By this arrangement weare enabled in many cases to dispense with match-plates andstripping-plates and to obtain castings which are duplicates of eachother and are free from tins and offsets. At two opposite sides theframe 62 is provided with V-shaped guide-bars 65 at right angles to theplane of the frame and suitably attached thereto, as by screws 66. Theguides 65 are ofla size adapted to it closely against the interior V`surface of the guides 45, hereinbefore mentioned. A vibrating engine 67is shown in Figs. 3 and 4 as being firmly secured to the pattern-carrier62. The relatively-long guidebars 45, 58, and 65 secure that each partof the frame shall move parallel with itself during the drawing of thepattern, and by their close tit against each other they prevent lateraldisplacement or motion of translation of the patternearryin g Aframe andthe pattern during the drawing, even when the vibrator lis in operationand delivering lateral blows.

It is not essential that the patterns be made of one piece, since theymay be built up of two or more pieces; but bytheuse ot an un.

divided pattern or one in which different parts, if employed, are notseparated from each other in any way, as by a match-plate, we securethat in many cases where such patterns may be used the molds shall beexact counterparts of the patterns employed.

Thecope and drag each may be formed of parts hinged, as at 68, andlocked together,

as at 69, by a cam-lock.

The construction illustrated in Fig. 5 comprises two mold-frames 70 7l,of metal, a match-plate 72, which is held between the frames 70 and 71,the frames and plate being provided with lugs 73 at opposite sides, anddowels 74, whereby the three are held t0- gether in a particularposition. The guides 45, 58, and 65 may be employed here also. Therapping-engine 6T is attached to the match-plate 72, as are the upperand lower sections 75 of the pattern.

In some cases we provide a frame 76 (see Fig. 1) similar to the cope anddrag frames hereinbet'ore mentioned and till it Witha hard composition77, of litharge, boiled linseed-oil, and sand, (or this may be replacedby wood, clay, or sa nd,) which is shaped to support the pattern, as askew-bevel-gear pattern 61, the frame 76 being rabbeted to receive thefratrie 62. The frame 76 is provided with guides similar to the guides58 and adapted to fit on the exterior of the guides 45 of the drag andIOO IIO

attached to the frame 76 in a manner similar to that hereinbeforedescribed.

It is remarked that the guides 45, 58, and (and especially guides 45 and65) have long close-fitting V-shaped bearings on each other and that thesaid lengthy bearings hold the mold parts and pattern-carrier each inparallelism with itself as it is put in and removed from place in theassembled flask-that is, it cannot wabble or turn as on a pivot or axisand also that each is compelled to move in a rectilinear directionduring assemblage and disassemblage. These features of non-Wabbling andrectilinear `:motion constitute important parts of our invention andsecure the attainment of several of theobjects thereof.

The method of forming a mold by the described cope and drag and thefilled frame or match-frame 76 will now be described. The frame 76 isplaced upon the table 4, and the pattern-carrier and patterns are put inplace, as indicated in Fig. 1, after which the drag 42 is putinposition, the guides 45 thereof entering between the guides 65 and 58 ofthe pattern-carrier and the frame 76, respectively, (see Fig. 1,) andthe edges of the frame 42 being notched to receive the bars 64 of thegate of patterns. Sand is now thrown into the drag and pressed downsomewhat and may be heaped somewhat above the surface of the drag, andthe parts are then placed in position under the rammeri19. The handle18is now turned forward, admitting the steam, air, f

or fluid pressure to the cylinder 3, which is thereby forciblyandquickly thrown upward to bring the sand against the rammer 19. Areverse motion of the lever 18 opens the waste 17, releasing thepressure in cylinder 3,which thereupon drops back to the position shownin Fig. 1. One or more blows may be given to the sand in the drag inthis manner, after which any loose sand above the drag is leveled off bya bar or otherwise. In practice, however, we prefer to place a rammingor bottom board 109x, which will pass withinA the drag on the sand inthe drag and to drive the sand by means thereof, the rammer 19 strikingon two (or more) battens 110x, secured to the board. The match-frame 76,drag, and pattern-carrier are now inverted, thus bringing thematch-frame on top, and the match frame is then removed, being guided ina straight line or direction and being held in parallelism with itselfin such removal by the V-guides above described. In other words, forsome of the purposes of this invention the match-frame 76 constitutes apart of a mold. After the match-frame is removed, as described, partingsand is sprinkled over the surface of the sand inthe drag. Next thecope-frame is put in place, its guides 58 engaging outside the' guides45 as it is put down on the drag. (See Fig. 4.) Then the flask iscentered under the rammer and the cope is filled with sand, a rammingboard being placed on top, if desired, and the operation of ramming iscarried out as in the case of the drag above described. After theramming is completed and the table 4 lowered to the normal positionthereof the rammer is turned back, (rods 22 against stops 29.) Thevibratorengine 67 is next started up, the valve at 103 being opened bypressing lever 105'rearward by the knee, and the cope is then liftedfrom the pattern, (or patterns,) being guided in a straight line andheld in parallelism with itself by the guides 45 and 58 during thedrawing` of the pattern, and is laid aside. Then while engine 67 isstill in operation the patterns are drawn from the drag by grasping thehandles 63 and lifting the carrier 62 and the patterns being moved `in astraight line and in parallelism with themselves during the operation.We remark that by the use of a pattern-carrier which supports thepattern at one or more places or points only along the parting-line ordiscontinuously, as distinguished` from a plate supporting the patternall around or`all along the partingline, the sand surfaces of the moldpartscome mold part, so that Wherever each pattern-` supporting arm orbar rests during the formation of the mold there is a cavity or openpassage which is stopped olf, as hereinafter set forth. By this methodor arrangement anyV sand at the parting-line that may break off from theupper mold part during the removal thereof from the pattern, asfrequently happens when match-plates are used and also where there isanything like a right angle, rests upon the sand of the lowermold part,so that after the pattern is removed and the cope is replaced this sandresumes its proper place in the completed mold, whereby fins on thecasting are prevented or avoided; but in case such sand adheres to amatch-plate where divided patterns or their equivalent, a plate havingthe pattern parts formed integrally therewith, are employed suchdetached sand cannot be replaced when the mold parts are assembled,whereby fins on the casting are the result. Afterward the channels inthe mold formed by the bars 64, which are in but one part of the mold,are closed in any suitable way, as by metal disks or the like placedtransversely thereto being forced into the sand or by plugs filling themor in some cases by pressing the adjacent sand into the channels by vthefingers, all as at 78, one of the channels being left open as a sprue,if desired.

Itis remarked that the engine 67 makes several thousand strokes perminute, thus IOO IIO

producing a continuous vibration of the patterns and the carrier orsupport therefor, owing to the small stroke and the relativelysmall massof the piston 67. The patterns do not appear to enlarge the moldssensibly, as, though they may be replaced, they cannot be drawn againwithout disturbing the sand except with the vibrator in operation, theaction of vibrator apparently being to lessen the adhesion of the sandto the sides of the pattern rather than to displace the sand from saidsides, it being borne in mind that the close-fitting guides for thepatterncarrier prevent any but up-and-down motion of the carrier andpattern at such times.

In order to provide that one rapping or vibrating engine may be used inconjunction with any number of pattern plates or carriers, and also toprovide for different heights of the pattern-plate above the table 4,the following construction is provided: In the construction illustratedin Fig. 1 the table is formed with an extension 79, to which is attacheda vertical sleeve 80. Vithin the sleeve 80 isa sleeve 81, provided withexterior screwthreads and with nut-s 82 above and below the. sleeve 80,the last-named sleeve being smooth on its inner surface. The nuts 82serve to vary lor regulate the height of the sleeve 8l in the bearing 80and to lock it firmly in position. Vtithin the sleeve 81 isa stud orbolt 88, provided with a shoulder 84 to rest upon the upper end of thesleeve 81 and with a screw-thread at its lower end for a nut 85, bywhich the stud 88 is held in position to turn within the sleeve 81. Ahead 86 is formed integrally with or attached to the stud 83. The engine67 in this instance is mounted upon the head 86 to slide lengthwisethereof, as hereinafter described, and is also provided with a verticalstandard 87, to which a vertical guide 88 is attached, as by screws 89.An arm 90 is attached to the slide 88, as bya plate 91 and screws 92, toslide up and down thereon, but to have no other motion relativelythereto. The arm 90 is provided with a dowel-pin 93, which is adapted toenter a perforation in an arm 94, attached to the frame 62, hereinbeforementioned, and

.to be detached therefrom by sliding the arm 90 upward. The operation offilling the cope and drag with sand and compacting the sand about thepatterns is substantially the same as that hereinbefore described, andthe vbrations set up by the relatively-fixed engine 67 are transmittedto the frame 62 and the pattern or patterns carried thereby by means ofthe arm 90, pin 92, and arm 94.

The engine 67 shown in section at Fig. 9 is similar in principle tothose shown in Patents No. 533,401, dated January 29, 1895, and No.582,325, dated May 11, 1897, the arm 87 being formed integrally with onehead or end of the cylinder of the engine. The engine 67 shown in thedrawings comprises a hollow cylinder having cylindrical ends providedwith external screw-threads, a downwardlyextending platel or lug 97, andan obliquely and upwardly extending lug or plate 67, a cap 67",screw-t-hreaded to engage with the one of said threaded-cylinder ends,the head carrying arm 87, which screws onto the other end of saidcylinder, metal abutments 67C, provided with flanges or disks clampedbetween the cylinder ends and the cap 67b and head 87, a plunger orpiston 67d, having reduced cylindrical ends to coact with abutments 67,two circumferential,grooves 67e, each connected by one or more channels(shown in dotted lines) with the space at the adjacent end of thepiston, but not in connection with each other, inlet-channel 67f in thelug 67, and outlet-channels opening into the air. (Indicated in Fig. 9by a black circlein the left-hand groove 67e.) Compressed air isadmitted through channel 67f from a tube 100, hereinafter described, andthe engine operates similarly to those in the patents above referred to.The engine is attached to a plate 95 by threaded screw-bolts 96, whichpass through the plate and enter threaded holes in the lug 97,projecting downward from the body of the cylinder of the engine. Thehead 86 is formed with parallel vertical sides, which are grooved toreceive the lug or plate 97, asillustrated in Fig. 10. By the describedconstruction the engine 67 may be slid along on the head 86 toward andfrom the cent-er of the table 4, and by means of the stud 83 the head 86may be swung as upon a pivot, carrying the engine with it.

In the construction illustrated at Fig. 9 the head 86 rests upon asurface, as of a bench ICO or table, and is connected with its pivot 81by means of a sleeve 83 and an arm 98, to which the head 86 is bolted.It is not essential that the pivot of the head 86 shall be connectedwith the table 4 or with a moldingmachine, nor is it essential that theengine 67 shall move up and down with the table 4 during the ramming ofthe sand by machinery, inasmuch as the described connection between theengine and the pattern-carrier through the instrumentality of the guide88 and the up-and-down movable arm 90 permit the up-and-down motion ofthe mold in ramming sand by machinery, as well as insuring that thepatterns shall be vibrated during the drawing of the pattern or mold.The engine 67 may be protected from falling sandvby inea-ns of a cover99, as indicated in Fig. 10. v

In the machine shown in Figs. 1 and 2 the compressed air is conveyed tothe engine 67 by means of rubber tubing 100,which receives the supply ofcompressed air through a tube 101, and a standard 102, which is providedbetween the standard 102 and the engine with a check-valve 103,providedV with a projecting stem 104, the tube delivering the air to thechannel 67f aforesaid. In front of the stem 104 is a vertically-disposedlever 105, pivoted to the table 4 in position to be pressed upon by theknee of the workman, and so to open the check-valve to admit the air tothe engine.

For the `purpose of blowing sand from the edges of the drag, cope, andpattern-frame a rubber tube 106 is connected with the air-passage in thestandard 102 and is provided with acheck-valve at 107 ,having a stem andthumbpiece 108, by means of which the valve may be opened at will. Thisvalve may be similar to that shownin Fig. 13 andI need not be shownfurther. The air issuing from the outlet in the tube 109 atcomparatively-high velocity quickly blows the loose sand from the edgesor surfaces of the drag and cope and pattern-frame. When not in use thetube 106 may be caught upon hook 110 on the standard 102.

` Our invention is not limited in certain features thereof to the use ofa machine for ramming the sand, for other modes of compacting the sandin the mold-frames may be used, as ramming by hand or by squeezing,without departing from our-invention as herein claimed. It will thus beseen that our invention contemplates the use thereof in con j unctionwith anyof the present methods of ramming, Whether by hand,power-operated machines, or what are known as hand-presses or squeezersoperated bya lever. Our invention is especially adapted to the largeclass of castings known as stove and ornamental castings, where a tinesurface finish is required. Such finish is usually obtained by theprocess known as .printing back, and we remark that our inventionsecures a finer result than present methods and also prevents the facing(usually graphitic in its nature) from adhering to the patterns, nordoes the melder require to be so skilful in drawing patterns, inasmuchas the guides above described are designed to automatically do the workof holding the patterns steady while being drawn.

Our invention is capable of embodiment in many forms and arrangementswithout departing from the spirit thereof. We therefore do not limitourselves to the form thereof shown in the drawings and described above.

Having thus fully and clearly described our invention and its mode ofoperation, what we claim as new, and desire to secure by Letters Patentof the United States, is

1. The combination of a mold -frame, an undivided pattern, and an openframe to which said pattern is rigidly but discontinuou'sly connected onthe parting-line, said pattern-carrying frame being adapted to rest onor be supported by said mold-frame, substanwith itself as the pattern isdrawn, substantially as described.

3. The combination of a mold-frame, an undivided pattern, and an openframe adapted to rest on or be supported by said moldframe and havingone or more arms or bars rigidly connected to and supporting the saidpattern discontinuously on the parting-line, substantially as described.

4. The combination of a mold-frame, V- shaped guide-bars thereon,anundivided pattern, an open frame adapted to rest on or be supported bysaid mold-frame and to which said pattern is rigidly connecteddiscontinuously on the parting-line by arms or bars, and V-shapedguide-bars on said patterncarrying frame and coacting with saidmoldframe guide-bars, substantially as described.`

5. The combination of mold-frames forming a complete fiask, an undividedpattern, and an open frame having one or more bars to which said patternis rigidly fast discontinuously on the'parting-line, said secondnamedframe being partly within and partly without said flask, substantiallyas described.

6. The combination of a plurality of moldframes forming a completeflask, an undivided pattern, an open frame having a bar or bars to whichsaid pattern is rigidly fast discontinuously on the parting-line, saidpattern-carrying frame being partly within and' partly without saidflask, and guide-bars on each of said frames coacting with each other tocause each frame to remain in parallelism with itself during the drawingof the pattern, substantially as described.

7. The combination of a mold-frame, au undividedpattern, a frame havinga bar or bars to which said pattern is rigidly fast, a vibratorconnected with said pattern-carrying frame, and guiding `means forpreventing lateral motion of translation of said pattern and itscarrying-frame as the pattern is drawn and said vibrator is operated,substantially as described.

8. The combination of a plurality of moldframes forming a completeflask, an undivided pattern, a frame having a bar or bars to which saidpattern is rigidly connected, said'pattern-carrying frame extendingoutsideof said ask, a vibrator connected with said pattern-carryingframe, and guide-bars arranged to cause each frame to remain inparallelism with itself and' to prevent lateral motion of translation ofthe pattern-carrying frame and pattern during the drawing of the patternand the operation of the vibrator, substantially as described.

9. The combination of a mold-frame, a pattern, a pattern-carrier, avibrator, and means for maintaining said carrier and pattern inparallelism with themselves and for prevent- IOC ric

tern, a pattern-carrier, a vibrator connected to said carrier, and meansfor maintaining said carrier and pattern in parallelism with themselvesas the pattern is drawn and for preventing lateral motion of translationof the carrier and pattern during the operation of the vibrator,substantially as described.

11. The combination of an open or halfmold frame, a pattern, apattern-carrier, a vibrator connected with said carrier,and means formaintaining said carrier and pattern in parallelism with themselves asthe pattern is drawn and for preventing' lateral motion of translationof the carrier and the pattern during the operation of the vibrator,substantially as described.

l2. The combination of an undivided pattern, a pattern-carrier rigidlyconnected with said pattern, said carrier being omitted at all pointsforming abutting-joint surfaces of the completed mold, a multiple-partmold-frame on or by which said pattern-carrier is supported, and avibrator connected with said pattern-carrier, substantially asdescribed.

13. The combination of an undivided pattern, a pattern-carrier rigidlyconnected with said pattern, said carrier being omitted at all pointsforming abutting-joint surfaces of the completed mold, a multiple-partmold-frame on or by which said carrier is supported, a vibratorconnected with said carrier,and means for preventing lateral motion oftranslation of said carrier and pattern as the pattern is drawn and thevibrator operated, substantially as described.

14. The combination of a multiplepart mold-frame, a pattern-carrierextending to the outside of the mold-frame and there provided with anear or lug, a vibrator having a verticallymovable member, and apin-andhole connection between said lng and member for detachablyengaging them together, substantially as described.

l5. The combination of a vibrating device provided with a Verticalguide, a slide on said guide,a mold-frame, a pattern-carrier extendingoutside of said mold-frame adjacent to said slide,and means forconnecting said slide and extension together.

16. The combination of a dat table, a piston and cylinder for raisingand lowering the same, a mold-frame on said table, a rammer above thetable, a vibrating device at one side of the table and provided with avertical guide, a slide on said guide, a pattern in said moldframe, apattern-carrier extending outside of the mold-frame and adjacent to theslide, and means for connecting said slide and extension.

17. The combination of a dat table, arelatively-iiXed ram mer above thesam e, a vibrating device at one side of the table provided with avertical guide and movable toward and from the center of the table, anda slide on said guide and provided with engaging means whereby the slidemay be connected with a pattern, pattern-carrier, or plate.

18. In a molding-machine, the combination of a flat table, a cylinderand piston operating the same, a ram mer abovethe t-able, a vibratingdevice at one side of the table and movable toward and from the centerof the table and also swinging horizontally, a vertical guide connectedwith said vibrator, a slide on said guide, a mold-frame, apattern withinthe mold-frame, a pattern-carrier extending outside the mold-frame, andmeans for connecting said extension and said slide together.

19. The combination ofa mold-frame, a pattern therein, and arelatively-fixed vibrating device having an independentlymovable memberconnected to and moving with said pattern as the pattern is drawn.

20. The combination ofa 1n old-frame, a pattern therein, arelatively-fixed vibrator-engine having an independently-movable member,and a pattern-carrier connected with said member and moving the same asthe pattern is drawn.

2l. Thecombinationofamold-frame,apattern therein, a patterncarrier,guides for maintaining the pattern-carrier in parallelism with itself asthe pattern is Withdrawn from the mold, and a relatively-xed vibratordevice having an independently-movable member connected with saidcarrier.

22. The combination of a multiple-part mold-frame, a pattern within thesame, apattern carrier extending outside the mold-Y frame, guides formaintaining the carrier and pattern in parallelism withthemselves as thepattern is drawn, and a relatively-fixed vibrator-engine having anindependently-movable member connected with and moved by said carrierduring such drawing.

2.3. The combination of a multiple -part mold-frame, a pattern withinthe same, apattern-carrier, guides for maintaining the mold parts,pattern and carrier each in parallelism with itself as the parts areseparated in the drawing of the pattern, and arelatively-ixedvibrator-engine having a movable member connected to and moved by thepattern-carrier as the pattern is drawn.

24. The combination of a multiple part mold frame, a pattern within thesame, a frame exterior to and supported by the mold and connected to andsupporting the pattern, guides for keeping the mold parts, pattern andframe in parallelism each with itself during their separation in thedrawing of the pattern, and a relatively-tilted vibrator-engine havingan independently-movable part connected to and moved by said frameduring the drawing of the pattern.

25. The combination of a mold-support, with a vibrator-engine adjacentthe same and provided with means for detachably connecting it with apattern or a carrier or support therefor.

26. The combination of a mold support with a vibrating engine adjacentand movable independently relatively to the support IOO IIO

and provided with means for connecting the engine detachably with apattern or a carrier or support therefor.

27. The combination of a mold-support, a vibrating engine adjacent thesame, means for varying the position of the engine relatively tothe'support, and means for connecting the engine with a pattern or acarrier or support therefor while the pattern is in place in the moldand is being drawn.

28. The combination of a mold-support, a vibrator-engine adjacent thesame, means for varying the position of the engine relatively to thesupport in two directions in a plane parallel to the support, and avertically-movlable connector attached to the engine and adapted tocoact with a pattern or a carrier or support therefor while the patternis in place in the mold and is being drawn.

29. In a molding-machine, the combination of atable, a rammer, means forcausing rela tive motion of the table and the rammel', a

' vibrator-engine attached to and movable in of a table, a rammer, meansfor causing relative motion of the tableand the rammel', avibrator-engine attached to and adjust-able in a direction at rightangles to the plane of thetable, a guide-bar connected to said engineand extending at right angles to the plane of the table, and a connectormovable on said guide and adapted to coact with a pattern or a carrieror support therefor while the pattern is in place in the mold and isbeing drawn.

3l. In a molding-machine, the combination of a horizontal table, aralnlner, one of said parts moving toward and from the other duringrainming, a vibrator-engine attached to and adjustable vertically of thetable and movable in or parallel to the plane of the ta ble, a verticalguide connected to said engine, and a connector movable vertically onsaid guide and adapted to coact with a pattern, carrier or a supporttherefor while the pattern is in the mold and is being drawn.

32. In molding machinery, a Vibrator-engine or agitator provided with aguide and a member slidable along said guide for connecting the enginewith a pattern or carrier or support therefor.

HARRIS TABOR. EDGAR H. LMUM FORD.

Witn esses:

E. M. Woon, NATHAN LEAVITT.

